Visual impairment is a term experts use to describe any kind of vision loss, whether it’s someone who cannot see at all or someone who has partial vision loss. Some people are completely blind, but many others have what’s called legal blindness.
“Legal blindness” is a definition used by the United States government to determine eligibility for vocational training, rehabilitation, schooling, disability benefits, low vision devices, and tax exemption programs (20/200 visual acuity).